Swivel-joint for speedometer-driving connections.



J. K. STEWART. SWIVEL JOINT FOR SPEEDOMETER DRIVING CONNECTIONS.

APPLICATION FILED JULY 5, 1907. V

Patented Aug. 10, 1909.

Wii'zep ep 9 A QM fliezmfrf of a device embodying this inventionshowscrewed intqthe aperture in longitudinal displacement,

- central bolt, G.

1-35 ll arm projecting at T ilhiiTED STATES PATENT QFEKGE;

JOHN K. STEWART, OF CHIilACd) gLLINOIS.

SWIVEL-JQINT FOR SPEEIDOMETl 'Jh-DBIVING GONNECTION. specification ofLetters Patent.

No. 930,431. lPatented Au 10, 1909;.

. Application filed July 5,1907. sesame. 382,165.

, A and B, respectively. are designedfp l l Be it known that 1, JOHN K.STEWART, a ,port bearings forshaft elementsat li hten, v citizen of theUnited States, residing at Chigles to the axisv otthetwo-part.swiveledcycago, in the county of Cook and State of lindrical elements Illinois,have invented, new and useful IIn- A, there is vjournaled ashaftijele'me'nt, E, provements in Swivel-Joints for Speedomewhichprojects from thelendoi, said'f arm for ter-Driving Connections, ofwhich the fol connectionwith the speedometer. (not-shown) lowing is aspecification, reference being had. by any 'ower-transmitting,means, as:the to the drawings forming a part thereof. flexible s aft, f, i

The purpose of this invention is to provide whose casing of yfamiliarconstruction .18 an improved joint in the powertransmitting shownattached to said Iarm, A Niithin devices for actuating a speedometeronavethe bearing arm, B of the element, B, there hicle having in viewand adapted to the situis journaled a shaft, G, rotruding from'ltheation of such devices as being preferably fixedly mounted in someconvenient position observable by the operator nd as thereforepreferably or most conveniently for connection for actuating the speedindicating and recording evices from one of the wheels on the forwardaxle which is swiveledior steering. I

It consists in the elements ofc'onstruction and combination shown anddescribed as indicated in the claim. I

In the drawings :Figure 1. is an elevation To all whom it may concern:

connection to a wheel, asthepiniom- G; which isprovided for meshing.with a gearor gear rim (not shown) on the, wheel whose, speed is. to bemeasured. The shafts, and within the cylindrical elements A and B,bevelears, M and N; and on the argial bolt, there is journaledadoublebevele, ear, J-K, its two gear elements, J and K,

with the evel-gears,- bolt, 0, is reduced in diameter :from the threadedend for a suitable distance to at",- ford journal bearing for the doublebevelgear, J-K, and the shoulder, C,

ing the clamp by which it is carried for relating its initialpower-receiying pinion to a driving gear (not shown) on the wheel whosespeed is to be indicated. Fig. 2 is an axial double gear, in onedirection at the, proper section through all the shafts of the device.position for its engagement with the-bevel- This joint com rises atwo-part case, the gear which it is to drive. For stopping it'in twoparts, A an B, each comprising one the other direction and preventing;.any half of-a hollow cylinder rabbeted at their junction, as shown at aand b, for swiveling one u on the other about the axis of such cylinder.The opposite end of each half of the cylinder is: closed except as tothe central apertures, the center gear at that side there is provided vasleeve L, on the reduced portion of the axial; bolt,

C, of suitable length .to be stoppcdngainst, theinner surface of thehead oi; ,saidelelnent A, when the gear, tion against the shoulder, andiii-the other through theiaperture in one'oi said parts and directionagainst the'inner end of said sleeve,

' the other part and the gears, N and it, are properly inter and madesecure in said other art by -a ock meshed. nut, D, on the protruding enof the bolt. The two parts may thus be s'ecuredtogether so as tooscillate freely with res cot to each other while nevertheless retaineagainst any their bearing uponeach other at their rabbetcd' ends insuring their axial aline'ment without regard to the amount of bearingdenied by the 0., b, which receive bolt, C, such bolt being preferablyinserted vide for properly assembling theyparts ,of this device with thegears properly intermeshed there will be a distinct advantage in beingable to secure: the gears, Mand N,,to

shafts and I gears thereon are introduced ,into. the casing, since theaccess to thehubs of the gears at thepoint at which they. require. A andB, beside the cyfastening to their shafts is limited ortion described,has a are in place. in

ght an ice to the which the shafts are journaled'; and this axis of thecylindrical POItlOlL I aid arms, 1 will be particularly advantageous inview of Each of the parts, lindric al" rabbeted ,W;ithin the bearing'arin, co

the 1 terminal element, 11 9i end of the arm and adapted for o pelratiyeG, have on their inner ends respectively 1 acingop osltely for meshingrespectively MandfN, The axial.-

to stop said tendency to mesh too deeply with the driven. 9c

K, is stopped in one ,direc 5 It will be observed in K o rderi topi'othe ends of their'respectiveshatts before the 165 after they thepart of the fitting in the difficulty .of disconnecting the gears fromthe shafts after they are once secinely attached, which would makerepairs especially difli cult. It will also be observable that since theshafts, E and G, are necessarily stbpped endwise in-one direction by theends of'the hubs of the gears, M and N, it is iniportanthto providesmooth shoulders or counter-bores around the bearings of said bearing ofthe shaft, E, in which a steel bush bushing.

axial cavity cylindrical, the diameter of such ing 0 is provided in thearm, A. The outer diameter of such steel bushing, O,'is substantiallyequal to the extreme outer diameter of the pinion, M, to the outerpoints of its teeth, so that the pinion can be entered throng any boreadapted to receive the The sleeve or arm," A, has its cavity being suchas to receiv'ethe sleeve, 0,

said sleeve being suitably bored axially to gear, M, will be thus affordbearing for the shaft, E, and counter bored to afford stop shoulders, 0,for the hub of the gear, M. Said ear may be secured fastte the end ofits shaft," E, before being inserted into the bushing, the bushingcarrygear being then inserted to the proper depth to cause thegear, M,to mesh with the member, J, of the gear, JK. Any convenient means maybeemployed to secure the bushing in the arm, A, at a point at which theproperly meshed. The application of the same mode of construet lOH tothe bearing ofith'e shaft, G, is obvious;

I prefer tomake both the members, A and 7 B of the shell or case ofmetal which can be i as it is commonly called, pgimped 'in, and a ingthe shell, or 1 ing in a steel die or mold into formed by cast which themetal isforced under pressure, or,

view-of this mode of m rather, in view of the character of the metalmeans of a threaded spindle being designed which will be used when it ismade in this manner, I prefer to secure the bushing, O, by pin Q, whichtakes through a lateral aperture, a, in the arm, A, and is screwed intothe bushin ,'.O, which is suitably bored and ta' ped at t e right ointhls' method of he ding avoids any deficiency of strength which therelatively soft metal ofthe shell might have for holding a set screw orany otlier form of fastening requiring e'rwagement of a thread with thesoft metal. T e bushing, O,

of the member indle' extends, said or connection with stated, terminatesin a from which the driven s a flexible sl'iaft, as

with .anges, 0,

threaded boss, 0 which affords the means of attaching to the shell orcase the terminal coupling, F, of the flexible shaft casing.

When employing a case made in the man-' ner described and, of thecharacter of metal which can be thus made that is to say, by bein forcedor pumped intoa steel die or mold,-a steel lining or bushing isdesirable, even when it is not considered necessary or important toprovide for introducing the gear on its spindle through the arm. To meetthis necessity the shaft, G, is provided with a steel bushing, P, whichis driven into the arm, B of the shell and affords by its inner end theshoulder against which the hub of the bevel-gear, N stops. In thisconstruction the gear is necessarily applied to the shaft and ,pinnedthereto after the latter is inserted through the bushin It will beobserved that while the bushings stop the bevel-gears, M and N, againstoutwvard movement, there is nothing to sto them against inward movementwhic might cause them to n eshtoo-deeply with the double bevel ear, JK,except the devices which ma ends of the shaft,

as, for example, the gear,

e connected to the outer G}, whose hub affords a stop in the op osite'direction against the outer end of the ush-' ing, P. 'ihc flexible shaftattached to the shaft, E, however, doesnot afford such stop, and itmight often be the case that the connection made through the shaft, Gwould not be such as to serve the purpose of a stop, 1 prefer, thereforeto stop the shafts, E and G, at their inner ends against the sleeve, L,andthe unreduced portion of the bolt, C, and for this purpose the shaftsare terminated in a blunt tapered end protruding from the center of thebevehgears into contact with said sleeve and bolt, as shown at e and g.The bushin s, O and P, are preferably formed which stop against theouter ends of the arms, A and B.

The arm, B, is shown longer and of less diameter than the arm, A, arm ofless diameter than would be necessary to permit the withdrawal of thegear through it and the emplo ment for that purpose of a suitablylarge'liushing, the advantage of that construction being sacrificed inorder to adapt the arm, B, to be held in a clamp, T, provided with aclamping bolt, T, so that the whole fitting may be adjustable lonitudinally and about the axis of ,the gear, and so that an excessivelylar e clamp maybe avoided and a reasonalily long bearing thereinafforded.

I claim l A device for the purpose indicated comprising a two-partcylindrical case, the two parts of which are :enga ed end to end forrelative rotationabout t eir common axis, and a bolt extending axiallythrough them fo'r' retaining them in engagement, 'eachof and a doublebevel -.gear, the shafts being extended through the bevel-gears on themres and stopped res ectively against t e unreduced'portion 0 the boltand said sleeve. *In testimony whereof, I have hereunto set my'hand, inthe presence of two witnesses, at l Chicago, Illinois, this i JOHN K.STEWART. In the presence of- M. .GERTRUDE' ADY, J. S. ABBOTT;

of the case member at that side of the double ectively 15 29th day ofJune, 1907. 20

